可可電臺，每期節目一話題，讓英語磨練耳朵的同時學到更多有益的小知識，豐富知識的同時受益于生活。

擺脫特困戶

Don't sleep more, exercise more

別老躺著，多起來hi一下。

Eight hours of sleep is usually enough for adults. Getting longer sleep may reduce activity in the cerebral cortex,making people sleepier.

Instead, slightly increase the level of your physical activity, which will help to send more oxygen to the brain, making us feel awake and energetic.

Aerobic exercise, such as jogging, swimming and rope skipping, are recommended.

【知識點津】

cortex n.皮質；樹皮；果皮

例句：

Within the epidermis develops a ring of parenchyma cells, the cortex.

在表皮細胞內有一個質壁細胞環, 即皮層.

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